jupyterlab Git Plugin up to 0.53.x Git History Tab PlainTextDiff.ts createHeader filename cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in jupyterlab Git Plugin up to 0.53.x. This issue affects the function createHeader of the file PlainTextDiff.ts of the component Git History Tab. This manipulation of the argument filename causes cross site scripting. The identification of this vulnerability is CVE-2026-54527. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in jupyterlab Git Plugin up to 0.53.x. Affected by this vulnerability is the function createHeader of the file PlainTextDiff.ts of the component Git History Tab. The manipulation of the argument filename with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. As an impact it is known to affect integrity. The summary by CVE is:

JupyterLab Git is a Git extension for JupyterLab. From 0.30.0b3 before 0.54.0, the PlainTextDiff.ts createHeader() method passes Git filenames directly to innerHTML when rendering renamed files in commit history, allowing a crafted filename to execute JavaScript when a victim views the rename diff in the Git History tab. This issue is fixed in version 0.54.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-54527 since 06/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 0.54.0 eliminates this vulnerability.

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Productinfo

Type

• Versioning Software

Vendor

• jupyterlab

Name

• Git Plugin

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53

License

• open-source

CPE 2.3info

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CPE 2.2info

• 🔒
• 🔒
• 🔒

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